Ancestry Merge Trees
Ancestry Merge Trees
The problem with merging two trees is that you will probably lose some data and/or relationships between people in the merged tree.

Ancestry Merge Trees

How To Combine Your Ancestry Trees Into One Master Tree

The problem with merging two trees is that you will probably lose some data and/or relationships between people in the merged tree. The solution is to keep one tree as a “source” tree and merge the other into it, rather than merge them together. This means that you will have both trees available if you need to go back and research

 1. What is an Ancestry Merge Tree? 

Merge Trees are one of the best tools to learn about your family. A merge tree combines information from multiple trees into a single tree that is updated as new information is added. They can be set up to show relationships between your ancestors, descendants and other people related to you such as siblings, parents, aunts and uncles.

Ancestry Merge Tree
Ancestry Merge Tree


2. How do I create an Ancestry Merge Tree? has created a new way to view your tree with the merge feature. This new way of viewing trees is called a merge tree, and it can be created from both and Family Search Family Tree. You can use this new merge tree to combine information from multiple trees together into one single viewable chart. 


3. Why is it important to merge your trees? 

Merging is a way to clean up your tree. The result of merging will be a more accurate tree. Merging is essential because it helps you to keep track of your family tree, and it helps you to avoid duplicating information. Merging also helps you find common ancestors between two different trees. You can merge two trees together in the Ancestry Member Tree Merge Wizard.


4. Why should I merge my trees?

When you have multiple trees, single source merging (SSM) to help prevent duplication of information. When SSM finds duplicate


5. When should I merge my trees?

You should merge trees when:

The two trees have no common ancestors in the last four generations (or five generations if one of the trees is from another country). This means that they are completely unrelated, and that they are duplicates of each other. You can check this by going to your family page on Family Search


6. How do you merge your trees? 

If you’re using the GUI (recommended), select your local tree, then the remote tree. The software will ask if you want to merge or update. If you want to merge the trees, click yes, and it will automatically merge them for you. It works great! If you have a huge remote tree, it might take some time, though.

If you’re doing this from the command line, you can use “git fetch” to download the


7. What are the benefits of merging your trees? 

Merging your trees can help you to:

Find more relatives in your tree and therefore be able to share information with them. This can be very helpful if they have information that you don’t, such as a marriage certificate or a family photo;

Find living relatives in your tree – because the person you are looking for is not necessarily the person who is easiest to find. For example, someone’s birth certificate may list their mother’s name but not their father’s name.


8. What are the consequences of not merging your trees? 

Fossil-sources provides a clear distinction between the master and the working copy. In other words, you are never in doubt about which branch you are on. There is no need to wonder whether your work has been lost due to merging the wrong branches.

If you run Fossil from the command line (rather than using an integrated interface), it also makes it easier to run multiple instances of Fossil concurrently on different repositories.


9. Conclusion 

After the tree is merged, all of its leaves will be labelled with both <tt>NodeId</tt>s from the two trees.

For example, if a node with <tt>NodeId</tt> <tt>N1</tt> is found in both trees, then it will have both <tt>N1</tt> and <tt>N2</tt>. In addition, the newly created tree has new edges.